Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Reexamination Certificate
2007-10-23
2007-10-23
Edgar, Richard A. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
C416SDIG004
Reexamination Certificate
active
11046593
ABSTRACT:
A fan blade comprises an airfoil having a generally elliptical top surface and a generally elliptical bottom surface. The fan blade has a lower radius of curvature toward its leading edge as compared to a higher radius of curvature toward its trailing edge. When mounted to a rotating hub member, elliptical fan blades may provide air movement at significant efficiencies.
REFERENCES:
patent: 4968216 (1990-11-01), Anderson et al.
patent: 5564901 (1996-10-01), Moore
patent: 5725355 (1998-03-01), Crall et al.
patent: 5823480 (1998-10-01), La Roche
patent: 6039541 (2000-03-01), Parker et al.
patent: 6161797 (2000-12-01), Kirk et al.
patent: 6244821 (2001-06-01), Boyd et al.
patent: 6565320 (2003-05-01), Surles et al.
patent: 6719533 (2004-04-01), Bird
patent: 6884034 (2005-04-01), Parker et al.
patent: 2003/0095864 (2003-05-01), Ivanovic
patent: 3819145 (1989-12-01), None
patent: 100134 (1917-03-01), None
patent: 2050530 (1981-01-01), None
International Search Report, dated Aug. 19, 2005 for PCT Application No. PCT/US05/02703.
Written Opinion, dated Aug. 19, 2005 for PCT Application No. PCT/US05/02703.
EPO Search Report, dated Aug. 22, 2006 for EP 05250654.0.
EPO Search Report, dated Aug. 21, 2006 for EP 05250653.2.
Fairbank et al.; A Large Paddle Fan for Livestock Cooling; Jun. 1989; Canadian Society of Agricultural Engineering.
Author Unknown; Dairy Notes; May 1999; University of California Cooperative Extension.
Author Unknown; A Fan for All Seasons; Dec. 1999; Bell & Howell Information and Learning, American Society of Mechanical Engineers; Mechanical Engineering vol. 121, No. 12; pp. 58-60.
Author Unknown; Technical Guide: Commercial Industrial & Special Application Ceiling Fans; publisher and date unkown.
Author Unknown; Airfoil Design: HVLS, date Dec. 9, 2002.
Jain et al.; Experimental Investigation of the Flow Field of a Ceiling Fan; Jul. 2004; ASME Heat Transfer/Fluids Engineering Summer Conference; Paper No. HT-FED-2004-56226.
Screenshots from www.b737.org.uk, relating to winglets, printed May 2004.
Screenshots from oea.larc.nasa.gov, relating to winglets, printed May 2004.
Screenshots from Penn State Engineering website, relating to winglets, printed May 2004.
Delta T Corporation
Edgar Richard A.
Frost Brown Todd LLC
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